CN209624636U - A kind of experimental provision for acceleration sensor calibration - Google Patents
A kind of experimental provision for acceleration sensor calibration Download PDFInfo
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- CN209624636U CN209624636U CN201920703087.7U CN201920703087U CN209624636U CN 209624636 U CN209624636 U CN 209624636U CN 201920703087 U CN201920703087 U CN 201920703087U CN 209624636 U CN209624636 U CN 209624636U
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Abstract
The utility model relates to transducer calibration technologies, for the experimental provision for acceleration sensor calibration, including machine shaft, transmission mechanism, experiment porch, sensor fixed platform and slideway mechanism；Acceleration transducer to be calibrated is placed in sensor fixed platform, and is connect by transmission mechanism with machine shaft；It is arranged on slideway mechanism to sensor fixed platform slidable connection, slideway mechanism is fixed on experiment porch；Transmission mechanism is used to be converted to machine shaft in the circular motion of vertical plane the back and forth movement of horizontal plane.It can be achieved to demarcate the phase and amplitude of acceleration transducer acquisition signal, structure design is simple, and it is easy to disassemble and install, it is convenient that sensor under different operating conditions is demarcated.
Description
Technical field
The utility model relates to transducer calibration technology, specially a kind of experiment for acceleration sensor calibration is filled
It sets.
Background technique
Acceleration is change rate of the velocity vector about the time, is usually used to description object speed variation speed, accelerates
Degree is vector, and existing size has direction again.Its size is equal to the increment of speed in the unit time, and direction is identical as speed.Accelerate
Spending sensor is that one kind can measure acceleration, and acceleration can be converted to the electronic equipment of electric signal indirectly.According to biography
The difference of sensor sensing element, common acceleration transducer mainly has currently on the market: condenser type, inductance type, strain-type, pressure
Resistive and piezoelectric type etc..With the continuous development of society, the civil construction such as various super high-rise buildings, Longspan Bridge are constantly gushed
It is existing, the considerations of for civil structure safety and service life, generally require to carry out corresponding health monitoring to it to unhitch
The dynamic characteristics of structure, most effective means are exactly that model analysis is carried out to it, i.e., carry out mode ginseng to the structure under environmental excitation
Number identification, provides foundation for health monitoring of the structure under external load (such as load, earthquake load) when normal use.
The acceleration signal of acceleration transducer record is the basis of Constructional Modal Analysis, and the quality of signal quality (exists
Phase difference, difference in magnitude) determination of Modal Parameter Identification result is directly affected, inaccurate recognition result will lead to relevant knot
Optimal control effect is not achieved in structure vibration control apparatus (ATMD), and then brings unnecessary damage to the lives and properties of people
It loses.Therefore (before work) is installed in acceleration transducer, it is necessary to carry out demarcating accordingly to it and check.Exist on the market at present
The rating test platform of some sensors, it is high commonly used in calibration measurement since the vibration frequency of rating test platform is higher
The sensor of frequency acceleration signal, and low frequency signal cannot be demarcated well.
Summary of the invention
It is typically only capable to demarcate acceleration under high frequency motion for the prior art, it is difficult to guarantee sensor in low frequency
Data acquisition quality when work, traditional experimental provision have not when changing the frequency and amplitude of the movement of rating test platform
Foot and inconvenience, the utility model provide a kind of experimental provision for acceleration sensor calibration.
Experimental provision according to the present utility model for acceleration sensor calibration, including machine shaft, transmission mechanism,
Experiment porch, sensor fixed platform and slideway mechanism；Acceleration transducer to be calibrated is placed in sensor fixed platform,
And it is connect by transmission mechanism with machine shaft；It is arranged on slideway mechanism to sensor fixed platform slidable connection, slideway
Mechanism is fixed on experiment porch；Circular motion of the transmission mechanism for by machine shaft in vertical plane is converted to horizontal plane
Back and forth movement.
In a preferred embodiment, the transmission mechanism includes short chain bar and long chain bar, the both ends of long chain bar respectively with it is short
Chain bar, sensor fixed platform are connected, and the junction of long chain bar and short chain bar forms hinged structure；Sensor fixed platform and length
Chain bar connects to form movable hinge；Short chain bar connect with machine shaft to be formed it is clamped.
In a preferred embodiment, the slideway mechanism includes support frame and horizontal slide, and support frame includes pillar and company
Fitting, horizontal slide are connect by the connector with pillar, and pillar is fixedly connected with experiment porch, and sensor fixed platform can
Horizontal slide along slideway mechanism does back and forth movement.
In a preferred embodiment, the sensor fixed platform is equipped with bottom plate, fixture and controls two groups of pulleys, and every group
Pulley includes at least two wheels, and each wheel is fixed on backing plate, and backing plate is fixedly connected with bottom plate；Acceleration to be calibrated passes
Sensor is fixed on bottom plate.Acceleration transducer to be calibrated is fixed on bottom plate by fixture or buckle.
As can be known from the above technical solutions, the experimental provision of the acceleration sensor calibration of the utility model design, main portion
Part is sensor fixed platform (referred to as " fixed station "), slideway mechanism, long chain bar, short chain bar, machine shaft and experiment porch；Electricity
The frequency and amplitude of the kind of drive and change sensor back and forth movement are main wound between machine pivot and sensor movement
New point.Compared with prior art, the utility model is had the following advantages and beneficial effects:
1, the experimental provision can change simultaneously the vibration frequency and vibration amplitude of shaking platform, be used to acceleration sensing
The phase and amplitude of device acquisition signal is demarcated, and structure design is simple, and easy to disassemble and install, shape applicability is good；Calibration
Experiment condition flexibly changing, the sensor under different operating conditions can be demarcated according to calibration experiment demand.
2, the frequency that can change the horizontal movement of calibrating platform by changing the revolving speed of machine shaft (corresponds to and accelerates
Spend the frequency of periodic signal)；The length of the short chain bar connect can be connected to the motor by change to change calibrating platform indirectly
The displacement (amplitude corresponding to acceleration periodic signal) of horizontal movement.
3, the bottom plate in sensor fixed platform is equipped with the different threaded hole of multiple spacing, thus in calibrating platform horizontal plane
Interior, the threaded hole different by set spacing of both direction along the horizontal plane can press from both sides four according to the size of sensor
The installation site of tool is adjusted.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the utility model；
Fig. 2 is the schematic diagram of slideway mechanism；
Fig. 3 is the structural schematic diagram of sensor fixed platform；
Fig. 4 is the structural schematic diagram of transmission mechanism.
Specific embodiment
The present invention will be further described in detail with reference to the embodiments and the accompanying drawings, but the implementation of the utility model
Mode is without being limited thereto.
Embodiment
Such as Fig. 1, the utility model is used for the experimental provision of acceleration sensor calibration, including machine shaft 5, transmission mechanism
4, experiment porch 1, sensor fixed platform 3 and slideway mechanism 2；Acceleration transducer 6 to be calibrated is placed in sensor and fixes
On platform, and it is connect by transmission mechanism with machine shaft；And sensor fixed platform slidable connection slideway machine is set
On structure, slideway mechanism is fixed on experiment porch.Machine shaft is a part of drive system, from control system to drive system
The corresponding control signal drive motor rotation of input, drives sensor fixed platform to transport along slideway mechanism using transmission mechanism
It is dynamic.
Such as Fig. 2, slideway mechanism 2 includes support frame and horizontal slide 21, and support frame includes threaded pillar 22 and connection
Part 23, horizontal slide are connect by the connector with pillar, and pillar is fixedly connected by screw thread with experiment porch, and sensor is solid
Fixed platform can do back and forth movement along the horizontal slide of slideway mechanism；Several screw holes are provided on connector, horizontal slide can pacify
On different screw holes, to guarantee that the sensor fixed platform of varying cross-section size can easily fix in its plane.
Sensor fixed platform 3 is equipped with two groups of bottom plate 31, fixture 32 and left and right pulleys 33, and such as Fig. 3, bottom plate is equipped with more
A screw hole, every group of pulley include at least two wheels, and each wheel is fixed on a backing plate 34, and backing plate passes through nut and bottom plate
Screw hole be fixedly connected.Installation site of the backing plate on bottom plate can be adjusted according to the big freedom in minor affairs of sensor.To be calibrated adds
Velocity sensor and the bottom plate of sensor fixed platform are fixed by fixture；Fixture 32 includes connecting plate 321 and from connecting plate
Edge upwardly extends the clamping piece 322 to be formed, and connecting plate is equipped with screw hole, and connecting plate passes through nut and sensor fixed platform
The outside of bottom plate connection, clamping piece and acceleration transducer to be calibrated connects.In the present embodiment, at least four are equipped with
Fixture is separately mounted to the surrounding of sensor, so that sensor to be limited to the area surrounded on bottom plate by least four fixtures
In domain.(the same amplitude of same frequency can be demarcated to the sensor under different operating conditions by adjusting four fixtures of fixed platform；
Same frequency difference amplitude；With amplitude different frequency).
Transmission mechanism is used to be converted to machine shaft in the circular motion of vertical plane the back and forth movement of horizontal plane.Referring to
Fig. 4, in the present embodiment, transmission mechanism 4 includes short chain bar 41 and long chain bar 42, the both ends of long chain bar by bolt respectively with it is short
Chain bar, sensor fixed platform are connected, and the junction of long chain bar and short chain bar forms hinged structure, to guarantee two chain bars even
The place of connecing can along the circumferential direction relatively rotate；Short chain bar passes through special-shaped shaft 43 and connect with machine shaft 5.Sensor fixed platform is right
The screw hole of side and the screw hole of long-chain boom end form a movable hinge by nut, and short chain bar and machine shaft are connected to form solid
Branch, without relative displacement, guarantees that short chain bar can move in a circle with machine shaft.By two chain bars that one is long and the other is short,
The back and forth movement that the circular motion of machine shaft is effectively converted to sensor, i.e., along the horizontal movement of slideway；Pass through change
The length of short chain bar changes the radius of a circle that it moves in a circle on a vertical plane, and then changes sensor and transport in horizontal plane
Dynamic distance reaches the acceleration (amplitude corresponding to sensor record period signal) for changing sensor levels movement.
The utility model controls the rotational frequency of machine shaft by setting different parameters, and then reaches change indirectly and pass
Sensor does the period (frequency corresponding to sensor record period signal) of back and forth movement in plane；For to sensor in difference
The signal recorded when working under frequency band is demarcated.And machine shaft is controlled by the signal that control system exports, therefore
The signal and control system output signal recorded by acceleration transducer compares can be to acceleration sensing to be calibrated
Device is demarcated.
The working principle of the experimental provision: under the control of control system output signal, machine shaft moves in a circle, this
The circular motion of machine shaft is converted to fixed platform in horizontal plane by a short chain bar and a root long chain bar by experimental provision
Interior back and forth movement makes fixed platform there is the effect of acceleration in the horizontal plane.It is round-trip in the horizontal plane to change fixed platform
The period (frequency corresponding to acceleration periodic signal) of movement and the displacement of movement are (corresponding to desired acceleration periodic signal
Amplitude), mainly realized by changing control system to the short chain pole length of the output power of motor and connection machine shaft.
It is fixed flat that acceleration transducer to be calibrated can also be fixed on sensor using the connection type similar to buckle
On the bottom plate of platform.The sectional dimension of slideway other than using the circular cross-section of the present embodiment, can using rectangular section etc. other
Form.When changing the revolving speed of machine shaft, in a wide range of can by changing the output power of motor, a small range can be with
Change the revolving speed of shaft by gear reduction unit.Long chain bar can be connected with the connection type of short chain bar using bearing (bearing shell)
It connects.
Above-described embodiment is the preferable embodiment of the utility model, but the embodiments of the present invention is not by above-mentioned
The limitation of embodiment, it is made under other any spiritual essence and principles without departing from the utility model to change, modify, replacing
In generation, simplifies combination, should be equivalent substitute mode, is included within the protection scope of the utility model.
Claims (10)
1. a kind of experimental provision for acceleration sensor calibration, which is characterized in that including machine shaft, transmission mechanism, reality
Test platform, sensor fixed platform and slideway mechanism；Acceleration transducer to be calibrated is placed in sensor fixed platform, and
It is connect by transmission mechanism with machine shaft；It is arranged on slideway mechanism to sensor fixed platform slidable connection, slideway machine
Structure is fixed on experiment porch；Transmission mechanism is used to machine shaft being converted to the past of horizontal plane in the circular motion of vertical plane
Return movement.
2. the experimental provision according to claim 1 for acceleration sensor calibration, which is characterized in that the driver
Structure includes short chain bar and long chain bar, and the both ends of long chain bar are connected with short chain bar, sensor fixed platform respectively, long chain bar and short chain
The junction of bar forms hinged structure；Sensor fixed platform connect to form movable hinge with long chain bar；Short chain bar and motor turn
Axis connection forms clamped.
3. the experimental provision according to claim 2 for acceleration sensor calibration, which is characterized in that the short chain bar
It is connect by special-shaped shaft with machine shaft.
4. the experimental provision according to claim 2 for acceleration sensor calibration, which is characterized in that the long chain bar
It is connect by bolt or bearing with short chain bar.
5. the experimental provision according to claim 1 for acceleration sensor calibration, which is characterized in that the slideway machine
Structure includes support frame and horizontal slide, and support frame includes pillar and connector, and horizontal slide is connected by the connector and pillar
It connects, pillar is fixedly connected with experiment porch, and sensor fixed platform can do back and forth movement along the horizontal slide of slideway mechanism.
6. the experimental provision according to claim 5 for acceleration sensor calibration, which is characterized in that the connector
On be provided with it is several for installing the screw holes of horizontal slide.
7. the experimental provision according to claim 1 for acceleration sensor calibration, which is characterized in that the sensor
Fixed platform is equipped with two groups of bottom plate, fixture and left and right pulleys, and every group of pulley includes at least two wheels, and each wheel is fixed on
On backing plate, backing plate is fixedly connected with bottom plate；Acceleration transducer to be calibrated is fixed on bottom plate.
8. the experimental provision according to claim 7 for acceleration sensor calibration, which is characterized in that be calibrated adds
Velocity sensor is fixed on bottom plate by fixture or buckle.
9. the experimental provision according to claim 8 for acceleration sensor calibration, which is characterized in that the fixture packet
It including connecting plate and upwardly extends the clamping piece to be formed from connecting plate edge, connecting plate is connect with the bottom plate of sensor fixed platform,
The outside of clamping piece and acceleration transducer to be calibrated connects；The fixture is equipped at least four, is separately mounted to pass
The surrounding of sensor, to limiting acceleration transducer to be calibrated on bottom plate by least four fixture area defined
In.
10. the experimental provision according to claim 7 for acceleration sensor calibration, which is characterized in that the bottom plate
Multiple screw holes are equipped with, the backing plate is fixedly connected by nut with the screw hole of bottom plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920703087.7U CN209624636U (en) | 2019-05-16 | 2019-05-16 | A kind of experimental provision for acceleration sensor calibration |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920703087.7U CN209624636U (en) | 2019-05-16 | 2019-05-16 | A kind of experimental provision for acceleration sensor calibration |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209624636U true CN209624636U (en) | 2019-11-12 |
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ID=68442936
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920703087.7U Active CN209624636U (en) | 2019-05-16 | 2019-05-16 | A kind of experimental provision for acceleration sensor calibration |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209624636U (en) |
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2019
- 2019-05-16 CN CN201920703087.7U patent/CN209624636U/en active Active
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